Add min max ranges for charts

anserv/modules/course_stats/course_stats.py

@@ -140,7 +140,11 @@ def course_grades_view_base(fs, db, course, type,params):
         counter_keys = counter.keys()
         counter_keys.sort()
         counter_list = [[float(c),int(counter[c])] for c in counter_keys]
-        rendered_data = django.template.loader.render_to_string("grade_distribution/student_grade_distribution.html",{'graph_name' : fixed_name, 'chart_data' : counter_list, 'graph_title' : header})
+        tick_data = [float(c) for c in counter_keys]
+        min_val = min(tick_data + [0])
+        max_val = max(tick_data + [1])
+        context_dict = {'graph_name' : fixed_name, 'chart_data' : counter_list, 'graph_title' : header, 'tick_data' : tick_data, 'x_min' : min_val, 'x_max' : max_val}
+        rendered_data = django.template.loader.render_to_string("grade_distribution/student_grade_distribution.html",context_dict)
         charts.append(rendered_data)
     chart_string = " ".join(charts)
     return HttpResponse(chart_string)

anserv/templates/grade_distribution/student_grade_distribution.html

@@ -15,13 +15,14 @@ function render{{graph_name}}()
 {
     var graph_name = "{{graph_name}}";
     var chart_data = {{chart_data}};
+    var ticks = {{tick_data}};
 
     $.plot($("#" + graph_name), [
         {
             data: chart_data,
             bars: {
                 show: true,
-                barWidth: 1.0/((chart_data.length)/10),
+                barWidth: 1.0/((chart_data.length)/2),
                 align: "center"
             }
         }],
@@ -31,7 +32,10 @@ function render{{graph_name}}()
                 hoverable: true
             },
             xaxis: {
-                axisLabel: 'Score'
+                axisLabel: 'Score',
+                ticks: ticks,
+                min: {{x_min}},
+                max: {{x_max}}
             },
             yaxis: {
                 axisLabel: 'Count'